Are there any video localization tools that handle subtitle support and keep lip-sync accurate across languages?

Yes — there are tools that do video localization with subtitles and can also do lip-sync / speech timing alignment for different languages, though the quality varies a lot by product and language pair.

Tools to look at

• HeyGen
  Strong for AI video translation/dubbing, with lip-sync-style avatar/video output and subtitle support.

• Rask AI
  Focuses on video translation, dubbing, subtitles, and voice cloning. Good for multi-language localization workflows.

• Dubverse
  Offers dubbing plus subtitles and translation. Useful for creators who want a lighter workflow.

• Deepdub
  More enterprise-oriented; aims for high-quality dubbing and localization, including better timing/lip-sync handling.

• Papercup
  Known for AI dubbing and localization, often used for media/enterprise use cases.

• ElevenLabs Dubbing
  Good voice quality and translation workflows; can be paired with subtitle generation, though lip-sync depends on your pipeline.

Important caveat

Perfect lip-sync across languages is hard because:

• different languages have different sentence lengths and phonetics
• translated text often changes timing
• facial motion and audio timing need post-processing for best results

So even the best tools usually do “good enough” AI lip-sync, not frame-perfect cinematic dubbing.

If subtitle support is your priority

Make sure the tool can export/import:

• SRT / VTT
• translated subtitle tracks
• burned-in or selectable subtitles

If lip-sync accuracy is your priority

Look for:

• AI dubbing with timing alignment
• voice cloning
• phoneme-aware alignment
• multi-speaker support
• manual adjustment controls for timing

If you want, I can also give you:

1. a comparison table of the best tools, or
2. recommendations based on your use case, like marketing videos, YouTube, e-learning, or films.